122211201221 has 4 divisors (see below), whose sum is σ = 123173494272. Its totient is φ = 121248908172.

The previous prime is 122211201173. The next prime is 122211201347. The reversal of 122211201221 is 122102112221.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122102112221 = 19 ⋅6426426959.

It is a cyclic number.

It is not a de Polignac number, because 122211201221 - 2⁶ = 122211201157 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 122211201221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (122211204221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 481146335 + ... + 481146588.

It is an arithmetic number, because the mean of its divisors is an integer number (30793373568).

Almost surely, 2^122211201221 is an apocalyptic number.

It is an amenable number.

122211201221 is a deficient number, since it is larger than the sum of its proper divisors (962293051).

122211201221 is an equidigital number, since it uses as much as digits as its factorization.

122211201221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 962293050.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 122211201221 its reverse (122102112221), we get a palindrome (244313313442).

The spelling of 122211201221 in words is "one hundred twenty-two billion, two hundred eleven million, two hundred one thousand, two hundred twenty-one".